Inside out

In the mind of a young girl named Riley Andersen are a series of personified basic emotions that influence her actions: Joy, Anger, Fear, Disgust, and Sadness. Riley's experiences become memories that are stored as colored orbs and are sent into long-term memory each night. The aspects of the five most important "core memories" within her personality take the form of five floating islands. Joy acts as the leader because she perceives Sadness as an unnecessary burden for Riley. Joy also works to limit Sadness's influence.